Patents by Inventor Christoph Siffrin

Christoph Siffrin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for obtaining fatty acids from biomass by combined in/situ extraction, reaction and chromatography using compressed gases
    Patent number: 6350890
    Abstract: The invention relates to a method for obtaining fatty acid esters and fatty acids, preferably unsaturated fatty acid ethyl esters, from biological sources by continuous, combined in-situ extraction, reaction and chromatography. The invention is characterized in that simultaneously and in the same location, in the presence of a compressed gas and an 0.5-5 % stream of lower alcohols as modifiers and in the presence of an inert catalyst, the fatty acids are fully transesterified from their native fatty acid sources, which are selectively desorbed and eluated in the conditions specified above.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: February 26, 2002
    Assignee: AXIVA GmbH
    Inventors: Thomas Kiy, Christoph Siffrin, Heinz Engelhardt, Dirk Fabritius